Bid writing in construction (UK): how to write a tender that wins work

You've priced the job to the penny. You still lost the tender.

Often the price wasn't the problem. The written answers were.

Bid writing is writing the parts of a tender that aren't the price. That means the quality questions, the method statement and the social value answers. On most public jobs these carry real marks, so a sharp price with thin answers can still lose.

In short

• Bid writing (also called tender writing) is answering a tender's written questions so they score well.
• Under the Procurement Act 2023, public buyers must publish how they'll score your bid. Read that first, then write to it.
• Answer each question in order, with proof from real jobs: names, dates, numbers.
• A method statement answer says how you'll do this job, step by step, on this site.
• Lose a competitive public tender and the buyer must tell you your scores and why. Use that to win the next one.

What is bid writing?

Bid writing is the job of writing a tender's written answers so they win marks. In construction, that covers the quality questions, the method statement, health and safety, and social value.

It sits next to the pricing, not instead of it. You still price up the job. The bid writing is the part that tells the buyer why they can trust you to do it.

A bid writer is just whoever does that writing. In a small firm it's usually the owner, after a day on the tools.

Is bid writing the same as tender writing?

Yes, bid writing and tender writing mean the same thing. "Bid" and "tender" are both words for your offer to do the work.

You'll also see "tender response" (your whole submission) and "quality questions" (the written questions that are scored). Some buyers call the questions "method statements" or "technical questions". It's all the same job: answer what's asked, and prove it.

What goes into a construction bid?

A construction bid usually has a priced part and a written part. The tender documents list exactly what they want back.

Read the instructions before you write a word. Word limits, file types and the deadline are all set in the tender documents. Stick to them exactly.

How do buyers score a tender?

Public buyers score your bid against award criteria they publish in advance. They must also say how much each criterion counts.

That's the rule under the Procurement Act 2023, which came into force on 24 February 2025. The buyer picks the "most advantageous tender". That means the bid that meets their needs and scores best against the published criteria and scoring method.

Here's what the government's guidance says the buyer must do:

• Publish the award criteria and how tenders will be assessed against them.
• Make the criteria clear, measurable and specific, and linked to the contract.
• Set out how important each criterion is. That can be a weighting, a ranking or another clear way.

Price can be the only criterion. But the guidance says that's unlikely to suit most contracts. So on most public jobs, your written answers carry marks.

A worked example of the scoring

This is a worked example. Every tender sets its own split and scale, so always check yours.

Say a council splits the marks 60 per cent quality and 40 per cent price. One quality question is worth 15 of the 60 quality marks. Each answer is scored from 0 to 5.

Going from a 3 to a 4 on that one answer is worth 3 extra marks. To win those 3 marks on price instead, you'd often have to cut deep into your margin.

Where does social value come in?

Social value is the extra good a contract does for the local area, like jobs, training or using local firms. Central government buyers must give it at least 10 per cent of the total score.

That rule is in a policy note called PPN 002. It covers central government departments, their agencies and non-departmental public bodies, for procurements started from 1 October 2025.

Councils and housing associations aren't covered, but the note says other buyers may choose to follow it. Many ask social value questions anyway.

How do you write a quality answer that scores?

Answer exactly what's asked, in the order it's asked, with proof. Assessors mark against a list.

If a point isn't in your answer, they can't give you marks for it.

Here's a simple way to do it:

1. Break the question down. Copy it out. Underline every separate thing it asks. A question asking "how will you manage quality and snagging?" wants two answers.
2. Find the scoring guide. Look for what a top score needs. Use its words as your headings.
3. Plan before you write. Jot one or two points per part of the question. Put the most important first.
4. Prove every claim. Name a real job, a date and a result. "We handed over [job] in [month] [number] days early" beats "we always finish on time".
5. Make it about this job. Mention the site, the client and the risks in their documents. Generic text reads as generic.
6. Keep to the word limit. Short sentences. One idea each. Headings and lists if the buyer allows them.
7. Check it against the question. Tick off each part you underlined. Then get someone else to read it.

What should a method statement answer say?

A method statement answer explains how you'll do this job, step by step, on this site. It shows the buyer you've thought it through before you start.

Don't confuse it with your RAMS (risk assessment and method statement: the safety paperwork for a job). The safety RAMS are about doing the work safely.

A tender's method statement question is wider. It's about sequence, people, kit, programme and how you'll handle the client.

Our RAMS template covers the safety side.

Copy this outline and fill in the brackets:

1. Our understanding of the job. [What the work is, the site, and anything tricky you spotted in the drawings or spec.]

2. How we'll do it. [The main stages in order, for example set up, strip out, first fix, second fix, making good, snagging.]

3. Who will do it. [Named supervisor, team size, which trades are your own and which are subbies.]

4. Plant and materials. [Key kit, where materials come from, deliveries and storage on site.]

5. Programme. [How long each stage takes, and what could hold it up.]

6. Risks and how we'll handle them. [Two or three real risks for this site and what you'll do about each.]

7. Keeping the client and neighbours informed. [Who they ring, how often you'll update them, how you'll deal with complaints.]

What do assessors mark down?

Assessors mark down answers that don't answer the question. The most common faults are easy to fix:

• copying an answer from an old bid without changing it for this job;
• talking about your firm in general instead of the question asked;
• promises with no proof, like "we pride ourselves on quality";
• missing a part of the question;
• going over the word limit or ignoring the format;
• social value promises you can't keep.

Keep a bid library. That's a folder of your best answers, policies, insurances and case studies, kept up to date. Then each bid is editing, not starting from a blank page.

Our guide on how to win social housing tenders explains the evidence those buyers ask for.

What happens after you submit?

On a competitive public tender, the buyer has to tell you how you scored. Under the Procurement Act 2023, every supplier whose tender was assessed gets an "assessment summary".

It must arrive before the buyer publishes who won. It gives your score for each award criterion and explains why you got it. If you lost, you also get the winner's scoring information, so you can compare.

These rules apply to a competitive tender. They don't cover contracts called off from a framework (a list of approved suppliers set up earlier).

Read your assessment summary line by line. It tells you exactly where you dropped marks. Fix those answers in your bid library before the next tender.

Where you work matters too. The Procurement Act covers public buyers in England, Wales and Northern Ireland.

Devolved Scottish public bodies generally follow Scotland's own procurement rules instead. And a main contractor sending you an enquiry as a subbie sets its own rules, so read its enquiry documents.

What should you check before you submit?

Run through this list before you press send. Each one is an easy way to lose marks.

Don't leave it to the last hour. Uploads can take longer than you think, so aim to submit a day early.

Where Nexley fits

Nexley is AI software for UK tradespeople and small construction firms that prices tenders and measures take-offs. It also writes quotes and runs the back office through WhatsApp, linked to Xero, QuickBooks and Sage.

On a tender, Nexley takes the measuring off you. It measures the take-offs (the quantities off the drawings) and builds a bill of quantities priced from your own rates, usually the same day. You review it before anything goes out.

That leaves your evenings for the written answers, where the marks are. See how AI tendering software works, or try it free for 7 days.

Common questions

Should I pay for a bid writing service?

It depends on the size of the job and how often you tender. A bid writing service can help on a big framework bid, but you still have to give them the facts, the jobs and the people.

Nobody knows your work like you do. Many small firms write their own answers and pay for a one-off review instead. Our guide to the real cost of tendering helps you weigh up what each bid costs you.

Can you use AI for bid writing?

Yes, as long as the buyer's rules allow it and what you send is true. Government guidance for central government buyers (PPN 017) says suppliers using AI in a bid isn't banned.

Some buyers ask you to say whether you used AI. Under that guidance, those questions are for information only and shouldn't be scored.

Always check AI-written text against what you really do. We're writing a guide on this at /blog/ai-tender-writing-rules-uk/.

How long should a tender answer be?

As long as the word or page limit allows, and no longer than it needs to be. The limit is in the tender documents.

Aim to use most of it. A 500-word limit answered in 150 words usually misses points. But padding loses marks too, so cut anything that doesn't answer the question.

What does bid writing involve day to day?

Mostly reading, planning and proving. You read the tender documents and the scoring guide, plan each answer, then dig out the evidence: past jobs, photos, policies and certificates.

The writing itself is often the quickest part. The slow part is finding the proof.

That's why a tidy bid library saves so much time on every tender after the first. Next, we're writing a guide to finding construction tenders at /blog/find-construction-tenders-uk/.

Sources

This page is general guidance on how tenders are scored, not legal advice. Every tender sets its own rules, so the tender documents always come first.

• GOV.UK: Transforming public procurement (when the Procurement Act 2023 came into force) (gov.uk)
• GOV.UK: Guidance on assessing competitive tenders (gov.uk)
• GOV.UK: Guidance on assessment summaries (gov.uk)
• GOV.UK: PPN 002, taking account of social value in central government contracts (gov.uk)
• GOV.UK: PPN 017, improving transparency of AI use in procurement (gov.uk)
• GOV.UK: Guidance on devolved contracting authorities (Wales, Scotland and Northern Ireland) (gov.uk)
• Procurement Act 2023 (legislation.gov.uk)